WO2018169116A1 - Hydraulic system to which optional redundancy function is applied - Google Patents

Abstract

The objective of the present invention is to provide a hydraulic system, to which an optional redundancy function is applied, having driving devices separately arranged according to use and output specifications and enabling hydraulic sources supplied to each driving devices to be supplied to the driving device of the other side when necessary. To this end, disclosed in one embodiment of the present invention, is the hydraulic system to which the optional redundancy function is applied, comprising: a tank for supplying working oil; a first hydraulic device and a second hydraulic device connected to the tank and arranged in parallel; a first valve pack connected to the rear end of the first hydraulic device, and having a first hydraulic line and a plurality of valves; a second valve pack connected to the rear end of the second hydraulic device, and having a second hydraulic line and a plurality of valves; a first driving part comprising a plurality of driving devices driven by hydraulic pressure through the first valve pack; a second driving part comprising a plurality of driving devices driven by hydraulic pressure through the second valve pack; and a redundancy valve turned on/off between the first valve pack and the second valve pack so as to connect or disconnect the first hydraulic line and the second hydraulic line.

Description

Hydraulic system with optional redundancy

The present invention relates to a hydraulic system to which the selective redundancy function is applied. More specifically, the present invention relates to a hydraulic system to which a selective redundancy function is applied in which a hydraulic source for distributing a driving device according to a use and an output specification and supplying a hydraulic source to each of the driving devices can be supplied to a counterpart driving device as needed.

The hydraulic generator is a core part of the hydraulic system and refers to a hydraulic power unit or a hydraulic power pack (HPU). When the HPU generates hydraulic pressure, the hydraulic source is supplied to the directional control valve, and each drive unit is a hydraulic pressure sent from the directional control valve. Take control.

Normally, hydraulic systems for heavy machinery bring down work in the event of failure, which must be of high reliability by increasing additional costs. To this end, by applying a duplication method of connecting a plurality of drive units in parallel for one operation, a system can be designed so that one drive can operate through another drive even if a failure occurs. By applying the redundancy method that applies the generator, even if one hydraulic generator fails, the output is reduced, but the system is designed to operate the drive system.

SUMMARY OF THE INVENTION The present invention provides a hydraulic system to which a selective redundancy function is applied in which a hydraulic source for distributing the driving devices according to a use and an output specification and supplying the hydraulic source to each of the driving devices can be supplied to the opposite driving device as needed.

In addition, the present invention can supply the hydraulic source through the other hydraulic generator by activating the redundancy function even if one hydraulic generator fails, the negative effect that the system will be affected by the external load by deactivating the redundant function It is to provide a hydraulic system with selective redundancy that enables precise control by minimizing the

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those skilled in the art from the following description. It can be understood.

The hydraulic system to which the selective redundancy function is applied according to an embodiment of the present invention is connected to a tank for supplying operating oil, the tank being connected to the first hydraulic device and the second hydraulic device arranged in parallel, and the rear end of the first hydraulic device. And a first valve pack having a first hydraulic line and a plurality of valves, a second valve pack connected to a rear end of the second hydraulic device and having a second hydraulic line and a plurality of valves, hydraulic pressure through the first valve pack. A first drive unit composed of a plurality of drive units driven by a second drive unit, a second drive unit composed of a plurality of drive units driven by hydraulic pressure through the second valve pack, and between the first valve pack and the second valve pack In, it comprises a redundancy valve for connecting or disconnecting the first hydraulic line and the second hydraulic line through ON / OFF (OFF).

In addition, when the redundancy valve is turned off, the first drive unit by the first hydraulic unit and the second drive unit by the second hydraulic unit may constitute an independent hydraulic supply path.

When the first hydraulic device is defective, the redundancy valve is turned on, and the first driving unit may be driven by hydraulic pressure through the second valve pack.

In addition, when the second drive unit requires a high output, the redundancy valve is turned on, and the second drive unit may receive additional hydraulic pressure from the second valve pack.

The first driving unit may include a track motor, a boom cylinder arm cylinder, and a bucket cylinder, and the second driving unit may include a swing motor, a trenching motor, and an arm crushing motor.

In addition, the redundant valve may be composed of a poppet valve, a shuttle valve and a direction control valve.

In addition, the first hydraulic device and the second hydraulic device may have the same specifications.

In addition, the plurality of valves of the first valve pack or the second valve pack is composed of a plurality of direction control valves, it may be arranged in parallel.

In the hydraulic system to which the selective redundancy function according to the present invention is applied, a hydraulic source for separately arranging the driving devices according to the use and the output specification and supplying them to each other can be supplied to the counterpart driving device as needed.

In addition, the hydraulic system with the selective redundancy function according to the present invention can supply the hydraulic source through the other hydraulic generator by activating the redundancy function even if one hydraulic generator fails, and the system is subject to external load. By disabling the redundancy function for negative influences, precise control is possible by minimizing the effects.

On the other hand, the effect obtained in the present invention is not limited to the above-mentioned effects, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. Could be.

The following drawings, which are attached to this specification, illustrate preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.

1 is an overall configuration diagram of a hydraulic system to which the selective redundancy function is applied according to the present invention.

2 is a circuit diagram of a hydraulic system to which the selective redundancy function of the present invention is applied.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in various other forms, and the scope of the present invention is It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art.

In addition, in the following drawings, each configuration is exaggerated for convenience and clarity of description, the same reference numerals in the drawings refer to the same elements. As used herein, the term “and / or” includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups.

The following describes a hydraulic system to which the selective redundancy function is applied according to an embodiment of the present invention with reference to FIGS. 1 and 2.

1 is an overall configuration diagram of a hydraulic system to which the selective redundancy function is applied according to the present invention, and FIG. 2 is a circuit diagram of the hydraulic system to which the selective redundancy function is applied according to the present invention.

1 and 2 together, the hydraulic system to which the selective redundancy function according to an embodiment of the present invention is applied to the tank 100, the hydraulic generating device (210, 220), valve pack (310, 320), redundant valve 400 and the driving units 510, 520, and 530.

The tank 100 is a reservoir for storing oil, and may be associated with a return device to recover oil that has been supplied to each of the driving units 510, 520, and 530 through a hydraulic system. The return device may apply a conventional configuration in the field of heavy equipment, and detailed description thereof will be omitted.

The hydraulic generators 210 and 220 are branched in parallel to the first hydraulic generator 210 and the second hydraulic generator 220 at a rear end of the tank 100, and are arranged in a HPU (Hydraulic Power Unit) or HPP ( Hydraulic Power Pack. Here, the 1st oil pressure generator 210 and the 2nd oil pressure generator 220 are comprised using the oil pressure generator of the same specification.

The hydraulic pressure generating apparatuses 210 and 220 generate hydraulic pressure by pumping a flow rate in the tank 100 in which operating oil is stored, and the hydraulic pressure generated by supplying the flow rate to the valve packs 310 and 320 is generated by the valve pack 310 and 220. Via 320 to each hydraulic line 311, 321.

The valve packs 310 and 320 may include a second valve receiving hydraulic pressure from the first valve pack 310 and a second hydraulic generator 220 receiving hydraulic pressure from the first hydraulic pressure generating unit 210. Pack 320.

Here, although not shown, a check valve is installed between each of the hydraulic generators 210 and 220 and the valve packs 310 and 320, so that the high pressure flow rate sent to the valve packs 310 and 320 may be reduced. At 310 and 320, the reverse flow to the hydraulic generators 210 and 220 is blocked.

The first valve pack 310 includes a first hydraulic line 311 through which hydraulic pressure is transmitted and a plurality of valves 312, 313, 314, 315, and 316.

The first hydraulic line 311 provides a path of hydraulic pressure supplied from the first hydraulic pressure generating device 210, and the first driving part at the rear end through the plurality of valves 312, 313, 314, 315, and 316 arranged in parallel. 510 supplies the distributed hydraulic pressure to each.

The plurality of valves 312, 313, 314, 315, and 316 may be configured as proportional directional control valves.

Here, the number of the valves 312, 313, 314, 315, 316 can be changed depending on the configuration of the actuator (actuator) of the corresponding first drive unit 510.

The second valve pack 320 includes a second hydraulic line 321 through which hydraulic pressure is transmitted and a plurality of valves 322 and 323.

The second hydraulic line 321 provides a path of hydraulic pressure supplied from the second hydraulic pressure generating device 220, and each of the second driving parts 520 and 530 of the rear stage is provided through a plurality of valves 322 and 323 arranged in parallel. Supply the hydraulic pressure distributed to the

The plurality of valves 322 and 323 may be configured as proportional directional control valves.

Here, the number of the valves 322 and 323 can be changed depending on the configuration of the actuator (actuator) of the corresponding second drive unit 520.

The redundancy valve 400 is installed between the first valve pack 310 and the second valve pack 320 to connect and disconnect the first hydraulic line 311 and the second hydraulic line 321. Here, the redundant valve 400 may be designed as an on / off valve circuit by applying a poppet valve, a shuttle valve and a 2 / 3-way control valve.

That is, the redundancy valve 400 may be turned on or off through an electrical signal of a user, thereby connecting or disconnecting the first hydraulic line 311 and the second hydraulic line 321. You can set the direction.

The driving units 510, 520, and 530 use a track motor and a swing motor as driving devices for driving, and selectively use a multipurpose arm cylinder or other tool driving device, which is a driving device for work, and for each driving device. It is connected to the direction control valve of each of the valve pack (310, 320) according to the output specification. Here, the results of arranging the driving device in the direction control valve of the valve packs 310 and 320 are shown in Table 1 below.

	Working mode
	(1) Arm (Bucket)	(2) Arm (Rock crusher)	(3) Trenching cutter
	Valve pack 1	Motor: Track (left)	Motor: Track (left)	Motor: Track (left)
		Motor: Track (right)	Motor: Track (right)	Motor: Track (right)
		Cylinder: Boom	Cylinder: Boom	Cylinder: TrenchingBoom
		Cylinder: Arm	Cylinder: Arm	Cylinder: Depressor
Cylinder: Bucket		Cylinder: Bucket	-
Valve pack 2	-	Motor: Tool	Motor: Tool
	Motor: Swing	Motor: Swing	Motor: Swing

The driving units 510, 520, and 530 include a first driving unit 510 connected to the first valve pack 310, a second driving unit 520 and a third driving unit 530 connected to the second valve pack 320. do.

The driving units 510, 520, and 530 may be appropriately disposed according to the output and the purpose so that the valve packs 310 and 320 for driving device control may be simultaneously performed with the motion.

Here, in detail, the first drive unit 510 is a track motor (511, 512), a low consumption flow rate boom cylinder 513, arm cylinder 514 and the bucket cylinder 514 assuming a high output required It is configured and connected to the first valve pack 310.

In addition, the second drive unit 520 has a high output, and may be connected to the second valve pack 320 by being configured with a trenching motor 521 and an arm crushing motor 522 corresponding to a tool driving device.

In addition, the swing motor 530 is preferably connected to the second valve pack 320 for independence from the driving drive.

That is, the hydraulic pressure generating devices 210 and 220 are dualized by the first hydraulic pressure generating device 210 and the second hydraulic pressure generating device 220 which operate independently, and each of the hydraulic pressure generating devices 210 and 220 increases the flow rate. Pump to generate hydraulic pressure.

The first valve pack 310 and the second valve pack 320 may be configured to dualize flow rates supplied from the first hydraulic pressure generating device 210 and the second hydraulic pressure generating device 220, respectively. 2 is transmitted to the driver 520.

At this time, when one of the hydraulic pressure generating device of the first hydraulic pressure generating device 210 and the second hydraulic pressure generating device 220 is broken, the redundant valve 400 is the first hydraulic line 311 and the second hydraulic line 321. The first driver 510 and the second driver 520 may operate without interruption of work even when the total output is reduced.

In addition, when a specific driving device among the first driving unit 510 and the second driving unit 520 requires a high output, the redundant valve 400 connects the first hydraulic line 311 and the second hydraulic line 321. As a result, the hydraulic pressure may be supplied from another hydraulic generator 220 or 210 in addition to the connected hydraulic generator 210 or 220, so that a redundant function may be selectively implemented as necessary.

As described above, in the hydraulic system to which the selective redundancy function according to the present invention is applied, a hydraulic source for separately arranging the driving devices according to the use and the output specification and supplying them to each other may be supplied to the counterpart driving device as needed. Even if the hydraulic generator in the system fails, the redundancy function can be activated to supply the hydraulic source through other hydraulic generators, and the negative effect that the system is caused by external load can be minimized by disabling the redundancy function for precise control. It is possible.

What has been described above is only one embodiment for implementing a hydraulic system to which the selective redundancy function according to the present invention is applied, and the present invention is not limited to one embodiment, and as claimed in the following claims. Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

[Description of the code]

100: tank

210, 220: hydraulic generators 210, 220

310, 320: valve pack

400: redundancy valve

510, 520, 530: drive unit

Claims (8)

1. A tank for supplying working oil;

   A first hydraulic device and a second hydraulic device connected to the tank and arranged in parallel;

   A first valve pack connected to a rear end of the first hydraulic device and having a first hydraulic line and a plurality of valves;

   A second valve pack connected to a rear end of the second hydraulic device and having a second hydraulic line and a plurality of valves;

   A first driving part including a plurality of driving devices driven by hydraulic pressure through the first valve pack;

   A second drive part including a plurality of drive devices driven by hydraulic pressure through the second valve pack; And

   A redundant valve connecting or disconnecting the first hydraulic line and the second hydraulic line through an on / off state between the first valve pack and the second valve pack; Hydraulic system with a selective redundancy function comprising a.
2. The method of claim 1,

   When the redundancy valve is OFF (OFF),

   And a first drive unit by the first hydraulic unit and a second drive unit by the second hydraulic unit constitute independent hydraulic supply paths.
3. The method of claim 1,

   If the first hydraulic device is bad, the redundancy valve is turned on.

   The hydraulic system to which the selective redundancy function is applied, characterized in that the first drive unit is driven by the hydraulic pressure through the second valve pack.
4. The method of claim 1,

   When the second drive requires a high output, the redundancy valve is turned on (ON),

   The second drive unit is a hydraulic system to which the selective redundancy function is applied, characterized in that additional hydraulic pressure is supplied from the second valve pack.
5. The method of claim 1,

   The first drive unit includes a track motor, a boom cylinder arm cylinder, and a bucket cylinder,

   And the second drive unit includes a swing motor, a trenching motor, and an arm crushing motor.
6. The method of claim 1,

   The redundancy valve is a hydraulic system with a selective redundancy function, characterized in that consisting of a poppet valve, a shuttle valve and a directional control valve.
7. The method of claim 1,

   And said first hydraulic device and said second hydraulic device have the same specifications.
8. The method of claim 1,

   The plurality of valves of the first valve pack or the second valve pack is composed of a plurality of directional control valves, the hydraulic system to which the selective redundancy is applied, characterized in that arranged in parallel.

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